The Vietnamese eatery started three years ago as a booth inside the Chicago French Market, 131 N. Clinton St., where it's still going strong. A second location, a sit-down restaurant with lunch and dinner service, is a short walk from the market at 567 W. Lake St.

Unlike those two locations, the 900-square-foot outpost at Northwestern will serve breakfast, Vietnamese street food-style. Among the morning offerings: congee (rice porridge); banh mi op la, an omelet on a baguette with Chinese sausage, pate and other meats, and La Colombe coffee.

Owner Mary Nguyen Aregoni is one of the Saigon Sisters; her sister Theresa Nguyen is the other. Her mom also cooks, and her husband helps with the front-of-house and business end. Their executive chef is Matt Riordan, formerly of Pops for Champagne.

Aregoni said being able to bring her native cuisine to a wider audience was "gratifying."

Remi Love, an administrative assistant in Northwestern's surgery department, paused Friday near the Saigon Sisters entrance, where a locksmith was fixing the door. She said she's been ready and waiting.

"I Googled the menu and everything," Love said.

Love's co-worker, Latonnia Tulson, said when the other restaurants across the way opened earlier this year, the lines were so long "they had it roped off like a Hollywood premiere."

This likely isn't the end of Saigon Sisters' expansion. Aregoni said she has been asked by the French Market operators to join a permanent outdoor market in the works in New York's Herald Square. A representative with the market did not respond to requests for comment.

"I'd be up for that. I want to do it," Aregoni said.

Saigon Sisters in the Galter Pavilion is open weekdays from 7 a.m.-8 p.m. and 10 a.m.-4 p.m. Saturdays.